无法使用 jsoup 获取准确的图像和文本

分类：编程问答

如何解决无法使用 jsoup 获取准确的图像和文本

我想从以下网站获取图像 URL 和标题。我到处搜索并尝试了许多 jsoup 代码，但我无法获得确切的图像和标题。我已在清单文件中添加了 Internet 权限并添加了依赖项。

https://www.forbesindia.com/lists/2015-celebrity-100/1519/1

Website source screenshoot

到目前为止我已经尝试过这个

  new Thread(new Runnable()
        {
            //final EbayProduct product = new EbayProduct();
            @Override
            public void run()
            {
                try
                {
                    Document doc = Jsoup.connect("https://www.forbesindia.com/lists/2015-celebrity-100/1519/1").get();
                    Elements body = doc.getAllElements();
                    //System.out.println(body.select("tr").size());
                   // Log.i("Size",Integer.toString(body.select("td").size()));

                    for(Element e : body.select("img"))
                    {
                        String image = e.select(" img").attr("src");
                        String title = e.select("img").attr("alt");
                        celebURLs.add(image);
                        celebNames.add(title);
                        Log.i("bal",String.valueOf(celebURLs));
                        Log.i("bal2",String.valueOf(celebNames));
                    }

                    newQuestion();

                }catch (Exception ex){
   ex.printStackTrace();
                }


            }
        }).start();

这会提供来自网站而非列表的随机图像。

Logcat

2021-05-04 22:46:00.904 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png]
2021-05-04 22:46:00.904 25418-25548/com.example.guessthecelebrity I/bal2: []
2021-05-04 22:46:00.904 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/list/banner/list_1519.jpg]
2021-05-04 22:46:00.905 25418-25548/com.example.guessthecelebrity I/bal2: [,2015 Celebrity 100 - Forbes India Magazine]
2021-05-04 22:46:00.905 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/list/banner/list_1519.jpg,https://www.forbesindia.com/media/sectionimage/header/30under30_21_230_20210203091422_230x62.jpg]
2021-05-04 22:46:00.905 25418-25548/com.example.guessthecelebrity I/bal2: [,2015 Celebrity 100 - Forbes India Magazine,]
2021-05-04 22:46:00.906 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/30under30_21_230_20210203091422_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/managers_230_20201013010335_230x62.jpg]
2021-05-04 22:46:00.906 25418-25548/com.example.guessthecelebrity I/bal2: [,https://www.forbesindia.com/media/sectionimage/header/managers_230_20201013010335_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/forbesindia_richlist_sc230_20201008054355_230x62.jpg]
2021-05-04 22:46:00.906 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.907 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/forbesindia_richlist_sc230_20201008054355_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/wpower_2020_1_20200303061653_230x62.jpg]
2021-05-04 22:46:00.907 25418-25548/com.example.guessthecelebrity I/bal2: [,https://www.forbesindia.com/media/sectionimage/header/wpower_2020_1_20200303061653_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/30under30_section_sm_20200205082639_230x62.jpg]
2021-05-04 22:46:00.908 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.908 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/30under30_section_sm_20200205082639_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/celeb19_sm_20191219030109_230x62.jpg]
2021-05-04 22:46:00.909 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.909 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/celeb19_sm_20191219030109_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/richlist2019_230_20191011022510_230x62.jpg]
2021-05-04 22:46:00.909 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.910 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/richlist2019_230_20191011022510_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/wpower2019_230_20190301085545_230x62.jpg]
2021-05-04 22:46:00.910 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.911 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/wpower2019_230_20190301085545_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/30under30_2019_sm1_20190204072937_230x62.jpg]
2021-05-04 22:46:00.911 25418-25548/com.example.guessthecelebrity I/bal2: [,https://www.forbesindia.com/media/sectionimage/header/30under30_2019_sm1_20190204072937_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/celeb18_sm_20181205054447_230x62.jpg]
2021-05-04 22:46:00.912 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.913 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/celeb18_sm_20181205054447_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/richlistsection_sm_20181004054854_230x62.jpg]
2021-05-04 22:46:00.913 25418-25548/com.example.guessthecelebrity I/bal2: [,]
2021-05-04 22:46:00.914 25418-25548/com.example.guessthecelebrity I/bal: [https://www.forbesindia.com/forbes-rvp-files/images/forbes-logo.png,https://www.forbesindia.com/media/sectionimage/header/richlistsection_sm_20181004054854_230x62.jpg,https://www.forbesindia.com/media/sectionimage/header/supper50_sm_20180821013603_230x62.jpg]
2021-05-04 22:46:00.914 25418-25548/com.example.guessthecelebrity I/bal2: [,]

我得到的是图片网址和标题，但不是 100 个名人图片网址和标题。

完整的java文件

package com.example.guessthecelebrity;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MainActivity extends AppCompatActivity {




    ArrayList<String> celebURLs = new ArrayList<String>();
    ArrayList<String> celebNames = new ArrayList<String>();
    int chosenCeleb = 0;
    String[] answers = new String[4];
    int locationOfCorrectAnswer = 0;
    ImageView imageView;
    Button button0;
    Button button1;
    Button button2;
    Button button3;

    public void celebChosen(View view) {
        Log.i("bal","celebchosen");
        if (view.getTag().toString().equals(Integer.toString(locationOfCorrectAnswer))) {
            Toast.makeText(getApplicationContext(),"Correct!",Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(getApplicationContext(),"Worng! It was " + celebNames.get(chosenCeleb),Toast.LENGTH_SHORT).show();
        }

        newQuestion();
    }

    public class ImageDownloader extends AsyncTask<String,Void,Bitmap> {

        @Override
        protected Bitmap doInBackground(String... urls) {
            try {
                Log.i("bal","imagedownloader");
                URL url = new URL(urls[0]);

                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.connect();
                InputStream inputStream = connection.getInputStream();
                Bitmap myBitmap = BitmapFactory.decodeStream(inputStream);
                return myBitmap;

            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }
    }

    public class DownloadTask extends AsyncTask<String,String> {

        @Override
        protected String doInBackground(String... urls) {

            String result = "";
            URL url;
            HttpURLConnection urlConnection = null;

            try {
                Log.i("bal","downloadTask");

                url = new URL(urls[0]);

                urlConnection = (HttpURLConnection) url.openConnection();

                InputStream in = urlConnection.getInputStream();

                InputStreamReader reader = new InputStreamReader(in);

                int data = reader.read();

                while (data != -1) {
                    char current = (char) data;
                    result += current;
                    data = reader.read();
                }

                return result;

            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }

        }
    }

    public void newQuestion() {
        try {
            Log.i("bal","newQuestion");

            Random rand = new Random();

            chosenCeleb = rand.nextInt(celebURLs.size());

            ImageDownloader imageTask = new ImageDownloader();

            Bitmap celebImage = imageTask.execute(celebURLs.get(chosenCeleb)).get();

            imageView.setImageBitmap(celebImage);

            locationOfCorrectAnswer = rand.nextInt(4);

            int incorrectAnswerLocation;

            for (int i = 0; i < 4; i++) {
                if (i == locationOfCorrectAnswer) {
                    answers[i] = celebNames.get(chosenCeleb);
                } else {
                    incorrectAnswerLocation = rand.nextInt(celebURLs.size());

                    while (incorrectAnswerLocation == chosenCeleb) {
                        incorrectAnswerLocation = rand.nextInt(celebURLs.size());
                    }

                    answers[i] = celebNames.get(incorrectAnswerLocation);
                }
            }

            button0.setText(answers[0]);
            button1.setText(answers[1]);
            button2.setText(answers[2]);
            button3.setText(answers[3]);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = findViewById(R.id.imageView);
        button0 = findViewById(R.id.button0);
        button1 = findViewById(R.id.button1);
        button2 = findViewById(R.id.button2);
        button3 = findViewById(R.id.button3);

        DownloadTask task = new DownloadTask();
        String result = null;
        Log.i("bal","Works");

         new Thread(new Runnable()
        {
            //final EbayProduct product = new EbayProduct();
            @Override
            public void run()
            {
                try
                {
                    Document doc = Jsoup.connect("https://www.forbesindia.com/lists/2015-celebrity-100/1519/1").get();
                    Elements body = doc.getAllElements();
                    //System.out.println(body.select("tr").size());
                   // Log.i("Size",String.valueOf(celebNames));
                    }

                    newQuestion();

                }catch (Exception ex){
   ex.printStackTrace();
                }


            }
        }).start();
    }
}

XML 文件

  <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="#151414"
   tools:context=".MainActivity">

   <ImageView
       android:id="@+id/imageView"
       android:layout_width="0dp"
       android:layout_height="0dp"
       android:layout_marginStart="10dp"
       android:layout_marginTop="10dp"
       android:layout_marginEnd="10dp"
       android:layout_marginBottom="10dp"
       android:scaleType="fitCenter"
       app:layout_constraintBottom_toTopOf="@+id/button0"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintStart_toStartOf="parent"
       app:layout_constraintTop_toTopOf="parent"
       app:srcCompat="@android:color/holo_blue_bright" />

   <Button
       android:id="@+id/button3"
       android:layout_width="0dp"
       android:layout_height="wrap_content"
       android:layout_marginStart="10dp"
       android:layout_marginEnd="10dp"
       android:layout_marginBottom="10dp"
       android:onClick="celebChosen"
       android:tag="3"
       app:layout_constraintBottom_toBottomOf="parent"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintStart_toStartOf="parent" />

   <Button
       android:id="@+id/button2"
       android:layout_width="0dp"
       android:layout_height="wrap_content"
       android:layout_marginStart="10dp"
       android:layout_marginEnd="10dp"
       android:layout_marginBottom="10dp"
       android:onClick="celebChosen"
       android:tag="2"
       app:layout_constraintBottom_toTopOf="@+id/button3"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintHorizontal_bias="0.0"
       app:layout_constraintStart_toStartOf="parent" />

   <Button
       android:id="@+id/button1"
       android:layout_width="0dp"
       android:layout_height="wrap_content"
       android:layout_marginStart="10dp"
       android:layout_marginEnd="10dp"
       android:layout_marginBottom="10dp"
       android:onClick="celebChosen"
       android:tag="1"
       app:layout_constraintBottom_toTopOf="@+id/button2"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintHorizontal_bias="0.0"
       app:layout_constraintStart_toStartOf="parent" />

   <Button
       android:id="@+id/button0"
       android:layout_width="0dp"
       android:layout_height="wrap_content"
       android:layout_marginStart="10dp"
       android:layout_marginEnd="10dp"
       android:layout_marginBottom="10dp"
       android:onClick="celebChosen"
       android:tag="0"
       app:layout_constraintBottom_toTopOf="@+id/button1"
       app:layout_constraintEnd_toEndOf="parent"
       app:layout_constraintHorizontal_bias="0.0"
       app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

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